Bug 1483534 (CVE-2017-12809)

Summary:	CVE-2017-12809 Qemu: ide: flushing of empty CDROM drives leads to NULL dereference
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit, apevec, areis, ayoung, berrange, cfergeau, chrisw, cvsbot-xmlrpc, ddepaula, drjones, dwmw2, imammedo, itamar, jen, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, robinlee.sysu, sclewis, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:21:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1483536
Bug Blocks:	1455462

Description Prasad Pandit 2017-08-21 11:15:24 UTC

Quick emulator built with the IDE disk and CD/DVD-ROM Emulator support is
vulnerable to a null pointer dereference issue. It could occur while
flushing an empty CDROM device drive.

A privileged user inside guest could use this flaw to crash the Qemu process
resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg01850.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/08/21/2

Comment 1 Prasad Pandit 2017-08-21 11:16:05 UTC

Acknowledgments:

Name: Ryan Salsamendi (Palo Alto Networks PSIRT)

Comment 2 Prasad Pandit 2017-08-21 11:17:37 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1483536]

Comment 3 Fedora Update System 2017-11-07 22:14:06 UTC

qemu-2.9.1-2.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.